US4039600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of synthesis gas to aromatic hydrocarbons
Assignee: Mobil Oil AS
•
Filing: 1975-07-02
•
Granted: 1977-08-02
•
Expires: 1995-07-02
Abstract
Abstract Synthesis gas, a mixture comprising carbon monoxide and hydrogen, is converted to a product comprising methanol and unreacted carbon monoxide, possibly with hydrogen; the mixture is partially converted by carbonylation to a mixture comprising acetic acid, methanol and methyl acetate; and this mixture is converted to a hydrocarbon product rich in aromatic hydrocarbons by use of a high silica to alumina ratio, limited constraint index, zeolite such as a ZSM-5 zeolite.
Inventors
- 👤 Clarence D. Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:18
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C1/207; C07C29/00; C07C29/15; C07C29/151; C07C29/153; C07C29/154; C07C51/00; C07C51/10; C07C51/12; C10; C10G; C10G3/00; C10G3/42; C10G3/44; C10G3/48; C10G3/49; C07C2529/00; C07C2529/04; C07C2529/06; C10G2300/00; C10G2300/40; C10G2300/4081; C10G2400/00; C10G2400/02; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582; Y02P30/00; Y02P30/20; Y10; Y10S; Y10S208/00; Y10S208/95; Y10S585/00; Y10S585/8995; Y10S585/905; Y10S585/929; Y10S585/943
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
137 words
A process of converting carbon monoxide to gasoline boiling range aromatic hydrocarbons comprising: A. reacting carbon monoxide and hydrogen at about 450° to 750° F. in contact with a methanol synthesis catalyst to produce a product comprising methanol and carbon monoxide; B. reacting said methanol and said carbon monoxide at about 300° to 800° F. in contact with a carbonylation catalyst to produce a product comprising methanol and acetic acid; and C. converting said methanol and said acetic acid at about 500° to 1200° F. in contact with an aromatizing catalyst comprising a zeolite having a silica to alumina ratio of at least 12 and a constraint index of 1 to 12 to produce a product comprising normally liquid hydrocarbons the major portion of which are a conjunct mixture of C 6 and C 10 mono-cyclic aromatics.
Claim 2
Dependent Claim
137 words
A process of converting carbon monoxide to gasoline boiling range aromatic hydrocarbons comprising: A. reacting carbon monoxide and hydrogen at about 450° to 750° F. in contact with a methanol synthesis catalyst to produce a product comprising methanol and carbon monoxide; B. reacting said methanol and said carbon monoxide at about 300° to 800° F. in contact with a carbonylation catalyst to produce a product comprising methanol and acetic acid; and C. converting said methanol and said acetic acid at about 500° to 1200° F. in contact with an aromatizing catalyst comprising a zeolite having a silica to alumina ratio of at least 12 and a constraint index of 1 to 12 to produce a product comprising normally liquid hydrocarbons the major portion of which are a conjunct mixture of C 6 and C 10 mono-cyclic aromatics.
Claim 3
Dependent Claim
28 words
The process claimed in claim 1 wherein said methanol synthesis catalyst comprises zinc and copper; said carbonylation catalyst comprises rhodium and said aromatization catalyst comprises a ZSM-5 zeolite.
Claim 4
Dependent Claim
16 words
The process claimed in claim 1 including utilizing a homogeneous catalyst comprising rhodium in said carbonylation.
Claim 5
Dependent Claim
22 words
The process claimed in claim 1 including recovering carbon monoxide from the product of step C and recycling such to step A.
Claim 6
Dependent Claim
22 words
The process claimed in claim 1 including converting a non-petroleum fossil fuel to said carbon monoxide and hydrogen fed to step A.
Claim 7
Dependent Claim
41 words
The process claimed in claim 5 including producing a C 4 - hydrocarbon gas in step C; separating said gas from said normally liquid hydrocarbon products; and converting said gas along with said fossil fuel to said carbon monoxide and hydrogen.
Claim 8
Dependent Claim
18 words
The process claimed in claim 3 wherein said carbonylation is carried in effective contact with an iodine moiety.
Claim 9
Dependent Claim
12 words
The process claimed in claim 7 wherein said iodine moiety is recycled.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |